80252657521 has 3 divisors (see below), whose sum is σ = 80252940811. Its totient is φ = 80252374232.

The previous prime is 80252657483. The next prime is 80252657533. The reversal of 80252657521 is 12575625208.

The square root of 80252657521 is 283289.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12715043121 + 67537614400 = 112761^2 + 259880^2 .

It is not a de Polignac number, because 80252657521 - 2⁷ = 80252657393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80252657561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 141645 + ... + 424933.

Almost surely, 2^80252657521 is an apocalyptic number.

80252657521 is the 283289-th square number.

80252657521 is the 141645-th centered octagonal number.

It is an amenable number.

80252657521 is a deficient number, since it is larger than the sum of its proper divisors (283290).

80252657521 is an frugal number, since it uses more digits than its factorization.

80252657521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566578 (or 283289 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 80252657521 in words is "eighty billion, two hundred fifty-two million, six hundred fifty-seven thousand, five hundred twenty-one".